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The defects causing adrenal hyperplasia are congenital (i.e. present at birth). Steroidogenesis : The enzymes affected in CAH are represented by one red and four green bars on the top half of the diagram (for example, "21α-hydroxylase" is visible near the top center. "17α-hydroxylase" and "17,20 lyase" are carried out by a single enzyme). [ 29 ]
[2] [3] Congenital adrenal hyperplasia due to 21-hydroxylase deficiency in all its forms accounts for over 95% of diagnosed cases of all types of congenital adrenal hyperplasia. [4] Unless another specific enzyme is mentioned, CAH in most contexts refers to 21-hydroxylase deficiency, and different mutations related to enzyme impairment have ...
Late onset congenital adrenal hyperplasia (LOCAH), also known as nonclassic congenital adrenal hyperplasia (NCCAH or NCAH), is a milder form of congenital adrenal hyperplasia (CAH), [1] a group of autosomal recessive disorders characterized by impaired cortisol synthesis that leads to variable degrees of postnatal androgen excess. [1] [2] [3] [4]
It accounts for less than 5% of the cases of congenital adrenal hyperplasia and is inherited in an autosomal recessive manner with a reported incidence of about 1 in 1,000,000 births. [2] The most common forms of this condition impair both the 17α-hydroxylase activity and the 17,20-lyase activity of CYP17A1.
It primarily relates to virilization of the female genitalia in cases of congenital adrenal hyperplasia (CAH) and identifies five distinct stages, but in recent times has been used to describe the range of differentiation of genitalia, with normal infant presentation being shown on either end of the scale, female on the left (0) and male on the ...
Differential diagnosis of Adrenocorticotropic hormone deficiency includes Congenital adrenal hyperplasia, Addison's disease, and Secondary adrenal insufficiency. [ 1 ] Plasma ACTH levels when off glucocorticoid replacement therapy are the best parameter for differential diagnosis, as levels in primary adrenal insufficiency are generally above ...
Vaginal stenosis is the most common post-operative complication in people with congenital adrenal hyperplasia who have had genital reconstructive surgery in infancy or childhood. [17] Vaginal stenosis can be an immediate complication or may arise later in adolescence. [8]
Clitoromegaly is a rare condition and can be either present by birth or acquired later in life. If present at birth, congenital adrenal hyperplasia can be one of the causes, since in this condition the adrenal gland of the female fetus produces additional androgens and the newborn baby has ambiguous genitalia which are not clearly male or female.